I got two a year ago. Nobody buys them anymore.. Because old tech must be bad tech, even tho i'll put my money on a small port offey vs any dual plane EB, weiand DP manifold. Doesn't hurt to call.
The weiand actually has a good port match to the 318 heads.
The eddy performer is in between 318 and 360 port size.
The stock 340 you have will also work.
They still make the weiand.